· 1st Post. Vlan is down, line protocol is down. it usually happens when we haven't created any vlan n just applied command. # interface vlan xxx. # ip address x.x.x.x y.y.y.y. As if you delete your vlan 18 before unassigning the port . · Introduction. This document describes troubleshoot methodology for interface down scenario on ethernet www.doorway.ru link issues are quite common when the network is brought up for the first time or with interconnections which involve different Cisco/vendor devices. Step 1 To specify the switch port you want to configure, enter the following command: hostname (config)# interface ethernet0/port. Where port is 0 through 7. For example, enter the following command: hostname (config)# interface ethernet0/1. Step 2 To assign this switch port to a VLAN, enter the following command.
Configure the€ interface in local loopback Router#show ip int br | in GigabitEthernet0/0/1 GigabitEthernet0/0/1 YES manual down down Router#config t Enter configuration commands, one per line. End with CNTL/Z. STLDASR1(config)#interface gigabitEthernet 0/0/1 STLDASR1(config-if)#loopback mac. The tunnel source interface is in a down state. If the Interface State Control feature is enabled for Dynamic Multipoint VPN (DMVPN) and none of the NHSs respond, then the line protocol is put in a down state. For details on the Interface State Control Feature, see the DMVPN Tunnel Health Monitoring and Recovery Configuration Guide. Hi Phil, Your understanding is mostly correct. A couple notes: 1) sh ip int bri is about vlan interfaces and not about vlans. 2) Method refers to how the current IP address of the interface was assigned: from the command line (manual), or startup-config (NVRAM), or automatically (DHCP), etc. Expand Post.
Some common Layer 1 problems include the interface is administratively shut down. On switches, interfaces are up by default, but administrators can manually. Configure the interface in local loopback. Router#show ip int br | in GigabitEthernet0/0/1 GigabitEthernet0/0/1 YES manual down down. Learn how to Configure Interface Speed and Duplex on Cisco devices | Network Configuration Manager.
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